Manufacturer Secura Key Model RK600e Reader Dimensions Wall switch: 4.5 H x 3.2 W x 0.84 D (11.43 x 8.12 x 2.13 cm) Power Supply 50 mA / 100 mA avg/peak @ 9-14VDC Number of Users Up to 600 Reader Frequency 125 kHz Operating Temperature -40 to +158 F(-40 to +70 C) Voltage Input 9-14 VDC Cable Serial: 4-cond., shielded 18-24 AWG Read Range Molded Card up to 6 (15.24 cm), ISO Card/key tag up to 5 (12.70 cm) Warranty Lifetime Warranty Weight 1.2500